What regulates what enters and leaves the cell and provides protection and support?

The cell wall is the answer

Cell membrane

Explanation:

The answer cannot be the cell wall since it is fully permeable hence cannot regulate movement in and out of the cell.

The cell membrane however is selectively permeable hence it is able to regulate movement in and out of the cell

Hope this helps, brainliest would be appreciated :)

Cwould most likely affect a cow's offspring.hope this 's and give me brainiest!